Outwater Aluminum J Channel Fits Material 1/8-in Thick Clear Anodized (Satin) Finish Aluminum Cap Moulding 36-in in the Furniture Moulding department at Lowes.com
Amazon.com: 4 FT - 1/4" H Channel Anodized Aluminum 6063 Alloy T-6 Temper : Electronics
D626A
45-ALU Aluminum Channel - Corner - For Strips Up To 11mm - 1m / 2m | Super Bright LEDs